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MCQs

Total Questions : 97 | Page 4 of 10 pages
Question 31. A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat dies
to a height of 25 mm. The percentage change in diameter is
  1.    0
  2.    2.07
  3.    20.7
  4.    41.4
 Discuss Question
Answer: Option D. -> 41.4


-NA-


Question 32. Which one of the following configurations has the highest fin effectiveness?
  1.    Thin, closely spaced fins
  2.    Thin, widely spaced fins
  3.    Thick, widely spaced fins
  4.    Thick, closely spaced fins
 Discuss Question
Answer: Option A. -> Thin, closely spaced fins


-NA-


Question 33. At x = 0, the function f(x) = x3 + 1 has
  1.    a maximum value
  2.    a minimum value
  3.    a singularity
  4.    a point of inflection
 Discuss Question
Answer: Option D. -> a point of inflection


-NA-


Question 34. A circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is
  1.    395
  2.    790
  3.    1580
  4.    3160
 Discuss Question
Answer: Option B. -> 790


-NA-


Question 35. For a long slender column of uniform cross section, the ratio of critical buckling load for the case
with both ends clamped to the case with both ends hinged is
  1.    1
  2.    2
  3.    4
  4.    8
 Discuss Question
Answer: Option C. -> 4


-NA-


Question 36. For the spherical surface x2 + y2 + z2 = 1, the unit outward normal vector at the point (1/√2, 1/√2, 0) is given by
  1.    .
  2.    .
  3.    .
  4.    .
 Discuss Question
Answer: Option A. -> .


-NA-


Question 37. A cantilever beam of length L is subjected to a moment M at the free end. The moment of inertia of
the beam cross section about the neutral axis is I and the Young's modulus is E. The magnitude of
the maximum deflection is
  1.    ML2/2EI
  2.    ML2/EI
  3.    2ML2/EI
  4.    4ML2/EI
 Discuss Question
Answer: Option A. -> ML2/2EI


-NA-


Question 38. Details pertaining to an orthogonal metal cutting process are given below.Chip thickness ratio       0.4Undeformed thickness 0.6 mmRake angle           +10°Cutting speed   2.5 m/sMean thickness of primary shear zone 25 micronsThe shear strain rate in s“1 during the process is
  1.    0.1781 * 105
  2.    0.7754 * 105
  3.    1.0104 * 105
  4.    4.397 * 105
 Discuss Question
Answer: Option C. -> 1.0104 * 105


-NA-


Question 39. In a single pass drilling operation, a through hole of 15 mm diameter is to be drilled in a steel plate
of 50 mm thickness. Drill spindle speed is 500 rpm, feed is 0.2 mm/rev and drill point angle is
118°. Assuming 2 mm clearance at approach and exit, the total drill time (in seconds) is
  1.    35.1
  2.    32.4
  3.    31.2
  4.    30.1
 Discuss Question
Answer: Option A. -> 35.1


-NA-


Question 40. An incompressible fluid flows over a flat plate with zero pressure gradient. The boundary layer
thickness is 1 mm at a location where the Reynolds number is 1000. If the velocity of the fluid
alone is increased by a factor of 4, then the boundary layer thickness at the same location, in mm
will be
  1.    4
  2.    2
  3.    0.5
  4.    0.25
 Discuss Question
Answer: Option C. -> 0.5


-NA-


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